sup guys i have a little problem. i just rebuilt my gsr head because one of the valves cracked on me. after placing everything back to where it is supposed to be i did a compression check. i got 150psi all around except on #3 120psi. i know it is low but could it be that my timing is off and that is why i am getting low compression. the reason why i am asking this is because the first time i did a compression check on the motor i got like around 240psi and like 180psi on #3. (before the valve cracked on me)

any input will help the motors running like its got no power right now.

 

yeah your compression definatley is not right, it should not be down near 150 at all.

 

anyone else???

 

bump

 

was there anything changed when you did the valve job? Did you do the work or did someone else do it?

 

Sometimes when you take a head in for valve work they mess with the valve lashes, so u should check your timing and make sure the valve lashes are adjusted within spec.


intake - 0.006 to 0.007- inch
exhaust - 0.007 to 0.008 - inch

good luck